福建连城竹岗地区航磁异常特征及找矿远景预测

The Characteristics of Aeromagnetic Anomaly and the Ore-finding Perspective in Zhugang Area of Liancheng County,Fujian Province

通过对连城竹岗地区航磁异常特征及地质特征的分析,并对异常区北部田心铁多金属矿床成因探讨,认为连城—上杭复向斜宣和背斜东翼古生代沉积盆地中的经畲组是铁多金属成矿的有利层位,宽缓的地磁异常是深部经畲组中含磁铁矿、磁黄铁矿等板状磁性地质体引起的,指出该区是"攻深找盲"的合适靶区,有望实现找矿突破。

Based on the characteristics of aeromagnetic anomaly and geologic features in the Zhugang area of Liancheng County, the paper probes into the genesis of the Tianxin iron polymetallic deposit in the northern part of the anomalous zone. It is inferred that the strata of Jingshe Formation, which is situated at the Paleozoic sedimentation basin on the eastern limb of the anticline in the Liancheng-Shanghang synclinorium, is a favorable metallogenic horizon of iron polymetals and that the wider magnetic anomaly results from the platy magnetic geological body such as the magnetite and pyrrhotite in the lower strata of Jiangshe Formation. Therefore, it is considered that the surveyed area is a potential target area of hunting for deep and hidden ores, which is hopeful to come true the breakthrough of ore prospecting.